How to Bleed & Replace Brake Fluid on a 2014 Suzuki King Quad 750AXi 4x4

Shop parts for a 2014 Suzuki King Quad 750AXi 4x4 ATV.

Overview

This guide from MotoSport walks you through bleeding and replacing the brake fluid on a 2014 Suzuki King Quad 750AXi 4x4. Follow these steps for safe, reliable braking. This model uses a hydraulic brake system with a handlebar master cylinder (front) and a rear master/coupling or separate rear caliper depending on factory configuration — consult the owner's manual for reservoir location and exact system layout. Recommended fluid is DOT 4; always confirm with your manual and use clean, unopened brake fluid.

Tools & Supplies

  • DOT 4 brake fluid (new, unopened bottle)
  • Clear plastic tubing long enough to reach a catch jar
  • Small clear jar or catch bottle
  • 10mm and 8mm open-end wrenches (bleeder valve sizes vary)
  • Phillips & flat screwdrivers
  • Turkey baster or fluid syringe (to remove old fluid from reservoir)
  • Brake cleaner and rags
  • Latex or nitrile gloves and eye protection
  • Shop stand or jack, wheel chocks
  • Torque wrench for caliper bolts (refer to torque specs in manual)

Safety & Prep

  • Work on a flat, stable surface with the engine off and key removed.
  • Block wheels and secure the ATV on stands so wheels can rotate freely.
  • Wear eye protection & gloves. Brake fluid is corrosive to paint — cover painted surfaces and wipe spills immediately with water then clean thoroughly.
  • If the King Quad has a combined/front handlebar reservoir, identify which calipers are furthest from the master cylinder — start bleeding the farthest caliper first.

Step-by-Step: Replace Brake Fluid & Bleed System

  1. Locate the reservoir(s): clean the cap area to prevent contamination. Remove the cap, diaphragm, and cover plate. Use a turkey baster to remove most of the old fluid but do not let the reservoir run dry during the procedure.
  2. Top the reservoir with fresh DOT 4 fluid to the recommended level. Keep the cap loosely on between steps to limit contamination.
  3. Identify bleed order. General rule: start with the caliper farthest from the master cylinder and progress to the nearest. Typical order on many King Quad set-ups: rear caliper(s) first, then front caliper(s). If you have two rear calipers, do the farthest rear first, then the other rear, then the front(s).
  4. Set up the clear tubing over the bleeder nipple and place the other end in the catch jar partially filled with a little fresh fluid to prevent air re-entry. Loosen the bleeder nipple with the correct wrench but do not remove it.
  5. Have a helper pump the brake lever/pedal slowly 3-5 times and hold pressure. While held, open the bleeder nipple about 1/4 turn to allow fluid and air to escape into the tubing. Close the nipple before the helper releases pressure. Repeat until you see clear, bubble-free fluid coming out.
  6. Keep the reservoir topped with fresh fluid throughout bleeding. Never let it run dry or you will introduce air into the master cylinder.
  7. Repeat the process for each caliper in the established order. If the King Quad has proportioning or combined systems, bleed each circuit as shown in the manual; when in doubt, bleed all calipers until fluid is clear and free of bubbles.
  8. After bleeding all calipers, tighten bleeder nipples to spec (snug; do not over-torque). Wipe any spilled fluid and reinstall reservoir diaphragm and cap securely.
  9. Pump the brake lever/pedal several times to confirm firm feel. If the lever feels spongy, re-bleed the circuit showing softness.
  10. Test ride slowly in a controlled area to confirm braking performance and no leaks. Re-check fluid level after the test ride and top if necessary.

Notes Specific to the 2014 King Quad 750AXi

  • The 2014 King Quad 750AXi is a heavy ATV with larger brake hardware than smaller utility quads — use correct torque values for caliper and bleeder bolts from the Suzuki service manual.
  • This model commonly uses DOT 4 fluid from the factory; higher boiling point DOT 4 helps with heavier-duty use and trail heat. Avoid mixing with DOT 5 silicone fluid.
  • The machine may have a front handlebar master cylinder and a rear brake circuit that can include a proportioning valve or combined master in some trim packages — confirm reservoir arrangement before assuming bleed order.
  • Brake hoses routing can be tight around racks and frame. Inspect hoses for cracking, chafing, or swelling while servicing. Replace any worn hoses rather than only bleeding fluid.
  • Pads and rotors on this model are robust but check pad thickness and rotor condition while bleeding. Replace pads if thickness is below specification or if rotors are scored.

Troubleshooting

  • Persistent soft lever after bleeding: likely trapped air or a leaking component. Re-bleed and inspect master cylinder seals, caliper pistons, and hose integrity.
  • Brake pedal/lever sinks under load: check for internal leaks in master cylinder or calipers and replace seals as required.
  • If you see contaminated, dark, or oily fluid quickly after replacement, inspect for a leaking wheel cylinder or oil contamination from nearby engine seals and address the root cause.

Maintenance Interval & Disposal

Brake fluid should generally be replaced every 1-2 years or when it tests high in moisture content. For heavy use or towing, change more frequently. Dispose of old brake fluid as hazardous waste according to local regulations.

Final Checks

  • Confirm no leaks at bleeder nipples, caliper fittings, or reservoir.
  • Verify brake lever/pedal firmness and consistent stopping during test rides.
  • Record the service date and mileage for future maintenance.

For OEM replacement calipers, hoses, pads, or brake components tailored to your 2014 Suzuki King Quad 750AXi — MotoSport stocks parts and accessories to keep your brakes performing safely.

Related Shopping Categories

Shop Brake Fluid for a 2014 Suzuki King Quad 750AXi 4x4 ATV.

Shop Brake Bleeders for a 2014 Suzuki King Quad 750AXi 4x4 ATV.

Shop Brake Pads for a 2014 Suzuki King Quad 750AXi 4x4 ATV.

Shop Brake Lines for a 2014 Suzuki King Quad 750AXi 4x4 ATV.

Shop Brake Tools for a 2014 Suzuki King Quad 750AXi 4x4 ATV.

Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.